1
22
23 package com.liferay.portal.kernel.servlet;
24
25 import com.liferay.portal.kernel.util.StringPool;
26
27 import java.io.IOException;
28
29 import java.util.HashMap;
30 import java.util.Map;
31
32 import javax.servlet.ServletException;
33 import javax.servlet.http.HttpServlet;
34 import javax.servlet.http.HttpServletRequest;
35 import javax.servlet.http.HttpServletResponse;
36
37
47 public class PortalDelegatorServlet extends HttpServlet {
48
49 public static void addDelegate(String subContext, HttpServlet delegate) {
50 if (subContext == null) {
51 throw new IllegalArgumentException();
52 }
53
54 if (delegate == null) {
55 throw new IllegalArgumentException();
56 }
57
58 _delegates.put(subContext, delegate);
59 }
60
61 public static void removeDelegate(String subContext) {
62 if (subContext == null) {
63 throw new IllegalArgumentException();
64 }
65
66 _delegates.remove(subContext);
67 }
68
69 public void service(
70 HttpServletRequest request, HttpServletResponse response)
71 throws IOException, ServletException {
72
73 String uri = request.getPathInfo();
74
75 if ((uri == null) || (uri.length() == 0)) {
76 throw new ServletException("Path information is not specified");
77 }
78
79 String[] paths = uri.split(StringPool.SLASH);
80
81 if (paths.length < 2) {
82 throw new ServletException("Path " + uri + " is invalid");
83 }
84
85 HttpServlet delegate = _delegates.get(paths[1]);
86
87 if (delegate == null) {
88 throw new ServletException(
89 "No servlet registred for context " + paths[1]);
90 }
91
92 Thread currentThread = Thread.currentThread();
93
94 ClassLoader contextClassLoader = currentThread.getContextClassLoader();
95
96 try {
97 ClassLoader delegateClassLoader =
98 delegate.getClass().getClassLoader();
99
100 currentThread.setContextClassLoader(delegateClassLoader);
101
102 delegate.service(request, response);
103 }
104 finally {
105 currentThread.setContextClassLoader(contextClassLoader);
106 }
107 }
108
109 private static Map<String, HttpServlet> _delegates =
110 new HashMap<String, HttpServlet>();
111
112 }